<html>
    <head>
        <meta charset="utf-8">
        <script src="./js/jquery-3.6.0.min.js"></script>
        <script type="text/javascript">
        $(document).ready(function()
        {
            $("buttom").ready(function(){
                $("p").css({"font_size":"200%","background-color":"yellow","border":"6px double blue"})
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        </script>
    </head>
    <body>
        <h2>单击按钮(段落字体、背景和边框的变化)</h2>
        <p>段落换肤内容</p>
        <button type="button">段落换肤</button>
    </body>
</html>